एक डेटाबेस सिस्टम जिसमें ईवेंट-संचालित नियम और संबंधित ट्रिगर्स शामिल होते हैं, उसे कहा जाता है:

A database system that stores the history of changes and allows users to query both current and past states of the data is known as a:

In an Entity-Relationship (ER) diagram, derived attributes are represented by a:

To find the details of all employees whose salary is above ₹50,000, which of the following tuple relational calculus expressions is correct?